The study conducted at University of Queensland, Australia revealed that teenage girls, who had early puberty, are more likely to have delinquent behavior, being involved in stealing, fighting and drug taking. Unlike common belief, boys, who started puberty at the same age, were not more aggressive than their peers.
The study involved the data on more than 8,000 women and their children aged over 21 years. Professor Jake Najman, the leading author of the study said that it is still not clear why early puberty makes girls more aggressive and whether this tendency remains with the age.
The recent researches show that more and more girls tend to start puberty earlier, which may partly explain the growing number of teenagers with delinquent behavior, who are bullying, smoking and taking drugs. Researchers say that intervention programs meant to cope with aggressive behavior should be introduced before puberty for better results.
In general, girls tend to enter puberty at ages between 9 and 15, when such signs as the first periods start. Several studies show that nowadays girls tend to enter puberty earlier, and this increases the odds of starting early sex life or anti-social behavior.